Here are the few I'm familiar with:

• Anodyne - tried it few years ago and it seemed pretty decent, need to go back to it eventually.
• Coffee Talk - still in my backlog but looks like a coffee version of VA-11 Hall-A. Nice art style, saw positive opinions about it.
• They Bleed Pixels - fun but challenging platformer with lots of bloody combat.
• Wandersong - got pretty famous for a while. Haven't played it myself but what I saw seemed like a great little title.

I've only quickly skimmed through, but another two:

• A Short Hike, adventure/exploration game with relaxing gameplay, I really recommend this one
• ZeroRanger, "old-school" shmup with awesome gameplay and ost, if you're into shmups it's almost worth getting the bundle for this one alone tbh

I purchased the bundle and so far have been playing Spring Falls, Pixross, Beglitched, and Shutter Stroll. I am enjoying all of those.

Honestly it has a lot of good games, and at this price you can justify it by just one or two (like wandersong.)